In making a pizza, which process involves a chemical change?
o mixing spices for the sauce
o slicing pepperoni for the topping
o spreading cheese on the pizza
o baking the dough to form the crust

baking the dough to form the crust

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

answer: they produce more slow than unicellular organisms.